Silicon electro-optic micro-modulator fabricated in standard CMOS technology as components for all silicon monolithic integrated optoelectronic systems
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Xu, Kun

doi:10.1088/1361-6439/abf333

Cited by 379 publications

(76 citation statements)

References 41 publications

(42 reference statements)

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“…Until now, very few empirical studies evaluating the effectiveness of digital solutions for contact tracing have been performed. For example, References [ 96 , 97 ] presented the Si-CMOS optoelectronic micro-nano system technology, similar to the microwave photonics and RFs proposed by [ 101 ], for social distancing and contact tracing scenarios, which may enhance the technical aspect of the system. This area needs more attention for a proper implementation.…”

Section: Research Directions In Terms Of Wearables For the Covid-19 Pandemicmentioning

confidence: 99%

The Rise of Wearable Devices during the COVID-19 Pandemic: A Systematic Review

Channa

Popescu

Skibińska

et al. 2021

Sensors

137

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The COVID-19 pandemic has wreaked havoc globally and still persists even after a year of its initial outbreak. Several reasons can be considered: people are in close contact with each other, i.e., at a short range (1 m), and the healthcare system is not sufficiently developed or does not have enough facilities to manage and fight the pandemic, even in developed countries such as the USA and the U.K. and countries in Europe. There is a great need in healthcare for remote monitoring of COVID-19 symptoms. In the past year, a number of IoT-based devices and wearables have been introduced by researchers, providing good results in terms of high accuracy in diagnosing patients in the prodromal phase and in monitoring the symptoms of patients, i.e., respiratory rate, heart rate, temperature, etc. In this systematic review, we analyzed these wearables and their need in the healthcare system. The research was conducted using three databases: IEEE Xplore®, Web of Science®, and PubMed Central®, between December 2019 and June 2021. This article was based on the PRISMA guidelines. Initially, 1100 articles were identified while searching the scientific literature regarding this topic. After screening, ultimately, 70 articles were fully evaluated and included in this review. These articles were divided into two categories. The first one belongs to the on-body sensors (wearables), their types and positions, and the use of AI technology with ehealth wearables in different scenarios from screening to contact tracing. In the second category, we discuss the problems and solutions with respect to utilizing these wearables globally. This systematic review provides an extensive overview of wearable systems for the remote management and automated assessment of COVID-19, taking into account the reliability and acceptability of the implemented technologies.

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Section: Research Directions In Terms Of Wearables For the Covid-19 Pandemicmentioning

confidence: 99%

The Rise of Wearable Devices during the COVID-19 Pandemic: A Systematic Review

Channa

Popescu

Skibińska

et al. 2021

Sensors

137

View full text Add to dashboard Cite

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“…Therefore, one of the main advantages of feedback, circuit self-regulation, is lost in this methodology. To the authors' knowledge, this method is not widely used, although recently, several papers utilizing active feedback (and variations) techniques have been presented and reported quite promising results [26][27][28][29]. Another problem of feedback, the lack of stability at higher frequencies, is solved by the so-called modulation or envelope feedback.…”

Section: Feedback Linearizationmentioning

confidence: 99%

Linearization as a Solution for Power Amplifier Imperfections: A Review of Methods

2021

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Development of 5G networks requires a substantial increase to both spectral and power efficiency of transmitters. It is known that these two parameters are subjected to a mutual trade-off. To increase the linearity without losing power efficiency, linearization techniques are applied to power amplifiers. This paper aims to compare most popular linearization techniques to date and evaluate their applicability to upcoming 5G networks. The history of each respective linearization technique is followed by the main principle of operation, revealing advantages and disadvantages supported by concluding the latest research results. Three main groups of linearization methods currently known are feedforward, feedback, and predistortion, each with its own tradeoffs. Although digital predistortion seems to be the go-to method currently, other techniques with less research attention are still non-obsolete. А generalized discussion and a direct comparison of techniques analyzed are presented at the end of this paper. The article offers a systematic view on PA linearization problems which should be useful to researchers of this field. It is concluded that there are still a lot of problems that need to be addressed in every linearization technique in order to achieve 5G specifications.

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“…4a). Figure 7 shows application of the discussed PCF taper as a refractive index sensor for liquids, such sensors may be used, for example, for bio-chemical sensing [11,12].…”

Section: Sensor Applicationsmentioning

confidence: 99%

Lossy mode resonances in photonic crystal fibers

Sicacha

Minkovich

Sotsky

et al. 2021

J. Eur. Opt. Soc.-Rapid Publ.

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The interaction effect of the fundamental mode in a special photonic crystal fiber (PCF) with a thin-film absorbing coating deposited on a surface of a fiber cladding on the optical transmission of the PCF is theoretically studied. It is shown that the transmission has a multi-peak spectrum that is determined by the resonance capture of the fundamental PCF mode energy by the coating. In some cases, this capture is explained by a resonance coupling between the fundamental core mode and leaky modes of the coating, or between the fundamental PCF mode and cladding modes located between PCF air channels and the coating. Examples are presented of using this effect to develop fiber-optic sensors of refractive index or pressure, and to sense a nanoscale adsorption layer of ammonia molecules deposited on a coating surface contacting air.

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Silicon electro-optic micro-modulator fabricated in standard CMOS technology as components for all silicon monolithic integrated optoelectronic systems ^*

Cited by 379 publications

References 41 publications

The Rise of Wearable Devices during the COVID-19 Pandemic: A Systematic Review

The Rise of Wearable Devices during the COVID-19 Pandemic: A Systematic Review

Linearization as a Solution for Power Amplifier Imperfections: A Review of Methods

Lossy mode resonances in photonic crystal fibers

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Silicon electro-optic micro-modulator fabricated in standard CMOS technology as components for all silicon monolithic integrated optoelectronic systems *

Cited by 379 publications

References 41 publications

The Rise of Wearable Devices during the COVID-19 Pandemic: A Systematic Review

The Rise of Wearable Devices during the COVID-19 Pandemic: A Systematic Review

Linearization as a Solution for Power Amplifier Imperfections: A Review of Methods

Lossy mode resonances in photonic crystal fibers

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Product

Resources

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Silicon electro-optic micro-modulator fabricated in standard CMOS technology as components for all silicon monolithic integrated optoelectronic systems ^*